<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
</head>
<body>
	
</body>
<script type="text/javascript">
	v="{'username':'ao','age':'67','sex':'nv'}"
	obj=eval('('+v+')');
	alert(obj.username);
</script>
</html>